The risk of being jolted by 1,500 volts of electricity hasn't scared them off. Neither have fears of falling off the speeding electric trains.

So Indonesian railway officials on Monday will unleash a new weapon on commuters who squat on top of railway cars: spray them with colored dye, a local newspaper reported.

The state transit agency told the English-language newspaper Jakarta Post that it hopes the "unique approach" will deter passengers riding illegally on rooftops.